Modulating social learning-induced evaluation updating during human sleep
Chen, D.; Xia, T.; Yao, Z.; Zhang, L.; Hu, X.
Show abstract
People often change their evaluations upon learning about their peers evaluations, i.e., social learning. Given sleeps vital role in consolidating daytime experiences, sleep may facilitate social learning and thereby further changing peoples evaluations. Combining a social learning task and the sleep-based targeted memory reactivation technique, we asked whether social learning-induced evaluation changes can be modulated during sleep. After participants indicated their initial evaluation for snacks, they learned about their peers evaluation while hearing the snacks spoken names. During the post-learning non-rapid-eye-movement sleep, we re-played half of the snack names (i.e., cued snack) to reactivate the associated peers evaluations. Upon waking up, we found that the social learning-induced evaluation changes further enlarged for both cued and uncued snacks. Examining sleep electroencephalogram (EEG) activity revealed that cue-elicited delta-theta EEG power and the overnight N2 sleep spindle density predicted post-sleep evaluation changes for cued but not for uncued snacks. Our findings suggested that sleep-mediated memory reactivation processes could strengthen social learning-induced evaluation changes.
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